<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>InAppWebViewOnJsDialogTest</title>
    </head>
    <body>
        <h1>InAppWebViewOnJsDialogTest</h1>
        <script>
            window.addEventListener("flutterInAppWebViewPlatformReady", function(event) {
                alert("alert message");
                window.flutter_inappwebview.callHandler('confirm', confirm("confirm message"));
                window.flutter_inappwebview.callHandler('prompt', prompt("prompt message", "prompt default value"));
            });
        </script>
    </body>
</html>